Chemistry 2.1

Today we're going to run through the chemistry section for the test next week. If you understand how the two types of bonding are different and can draw covalent bonds, you have met the objectives for this lesson. 

HOMEWORK
Complete the work on the sheet at this link, thinking about how covalent and ionic bonds are different. use the other links from the questions below to help you if you get stuck. 

1. Explain what the 'groups' of the periodic table are.
2. Explain how electrons are organised around atoms - how many go in each 'shell'?
3. What happens to lithium to change from an atom to an ion?
4. Briefly summarise the characterisitcs of ionic bonds and covalent bonds.
5. Draw a covalent bond between 2 chlorine atoms.
6. The diagram below shows the charge on an ion of each element. If group 1 is +1, have they gained or lost an electron? Think about what charge an electron has:                                                         
7. Try these two tests (here and here), writing down how  many protons, neutrons and electrons an atom of Al has.      
8. Using the periodic table below, give an element with a +1 ionic charge and one with a -2 ionic charge.                                                                   
9. Extension - In what ratio would Mg and Cl join to from a compound with a balanced charge? What type of bonds would form? Explain your answer.
10. Once you're finished, try this activity.